AA Airworthiness Authorities
AB Abort
ABCU Alternate Braking Control Unit
ABN Abnormal
A/BRK Autobrake
ABV Above
AC Alternating Current
A/C Aircraft
ACARS ARINC Communication Addressing and Reporting System
ACCEL Acceleration
ACCU Accumulator
ACP Audio Control Panel
ACSC Air Conditioning System Controller
ACT Additional Center Tank
ADF Automatic Direction Finder
ADIRS Air Data Inertial Reference System
ADIRU Air Data Inertial Reference Unit
ADM Air Data Module
ADR Air Data Reference
ADV Advisory
AEVC Avionic Equipment Ventilation Controller
AFS Auto Flight System
AIDS Aircraft Integrated Data System
AIL Aileron
AIME Autonomous Integrity Monitoring Extrapolation
AIU Audio Interface Unit
ALT Altitude
ALTN Alternate
AMU Audio Management Unit
ANT Antenna
AOC Airline Operational Control
A/P Autopilot
APPR Approach
APPU Assymetry Position Pick off Unit
APU Auxiliary Power Unit
ARN Aircraft Registration Number
ARPT Airport
A/S Airspeed
ASAP As Soon As Possible
ASI Air Speed Indicator
ASP Audio Selector Panel
A/SKID Anti-skid
ATC Air Traffic Control
ATE Automatic Test Equipment
ATIS Airbus Technical Information System
A/THR Auto Thrust Function
ATS Auto Thrust System
ATSU Air Traffic Service Unit
ATT Attitude
AVNCS Avionics
AWY Airway
B Blue
BARO Barometric
BAT Battery
BCL Battery Charge Limiter
BCDS Bite Centralized Data System
BITE Built-in Test Equipment
BIU Bite Interface Unit
BFE Buyer Furnished Equipment
BMC Bleed Air Monitoring Computer
BNR Binary
BRG Bearing
BRK Brake
BRT Bright
BSCU Braking Steering Control Unit
BTC Bus Tie Contactor
BTL Bottle
C Centigrade
CAB Cabin
CAPT Captain, Capture
CAS Calibrated Airspeed
CAT Category
C/B Circuit Breaker
CBMS Circuit Breaker Monitoring System
CDL Configuration Deviation List
CDLS Cockpit Door Locking System
CDSS Cockpit Door Surveillance System
CDU Control Display Unit
CFDIU Centralized Fault Data Interface Unit
CFDS Centralized Fault Display System
CG Center of Gravity
CHG Change
CHK Check
CIDS Cabin Intercommunication Data System
CKPT Cockpit
C/L Checklist
CLB Climb
CLR Clear
CLSD Closed
CMPTR Computer
CM 1(2) Crewmember 1 (left seat) or 2 (right seat)
CO Company
COND Conditioning
CONF Configuration
CONT Continuous
CO RTE Company Route
CPCU Cabin Pressure Controller Unit
CRC Continuous Repetitive Chime
CRG Cargo
CRS Course
CRT Cathode Ray Tube
CRZ Cruise
CSCU Cargo Smoke Control Unit